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No. 624,824. Patentgd May 9, I899. C. A. KELLER.

ADJUSTABLE VIBBATOB FUR MAGNETIC GDILS (Application filed. Duo. 5, 1898.)

' UNITED STATES PATENT 4 OFFICE.

CHARLES A. KELLER, OF CLEVELAND, OHIO, ASSIGNOR TO THE HORTON ELECTRIC OBTUNDING COMPANY, OF SAME PLACE.

ADJUSTABLE VIBRATOR FOR MAGNETIC COILS.

SPECIFICATION forming part of Letters Patent No. 624,824, dated May 9, 1899.

Application filed December 5, 1898. Serial No. 698,290. (No model.) I

To all whom it may concern.-

Be it known that 1, CHARLES A. KELLER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Adjustable Vibrators for Magnetic Coils, of which the following is afull, clear, and exact' description, reference being had to the accompanying drawings.

My invention relates to the vibrator mechanism whereby an electric current is automatically interrupted indefinitely.

The object of the invention is to provide a simple device of this character which may be easily adjusted to perform its functions,which is not liable to get out of order, and which will act as an automatic switch to break the circuit when it is released from the position in-which it will vibrate.

The invention is particularly useful in connection with a medical battery, so called, although the usefulness is not restricted to such a device.

The invention consists in the construction and combination of parts hereinafter described, and pointed out in the claims.

In the drawings, Figure 1 is a perspective View of an apparatus which includes my invention, although the coils on the electro-- magnet are not shown. Fig. 2 is an end view of the apparatus when the vibrator is removed therefrom. Fig. 3 is a perspective view of the vibrator, and Fig. at is an enlarged plan view of the vibrator and the cooperating mechanism.

Referring to the parts by letters, A represents an electromagnet, its core being indicated by a.

B is the'vibrator-spring, which is a flat spring made fast at one end to a swiveled post Z).

b is an armature. It is attached to the other end of the spring in proper relation to the core a.

D is a contact-point secured to a fixed metallic post (Z.

The post I), as shown, is tubular and embraces and may turn upon a fixed cylindrical stud e. A set-screw F, which screws through this tubular post, is adapted to engage with this stud and rigidly fasten the swivel-post thereto. To adjust the vibrator, the post I) is turned to carry the spring against the contact-point D with sufficient force'to apply the proper tension to the spring and to bring the armature 19 within the attraction range of the magnet, and the post is secured in this position by means of the set-screw F. The contact-point D, vibrator-spring B, and electromagnet A are then connected in series in an electrical circuit. As shown, one end of the magnet-coil is connected by wire G with the battery H and the other end G with the metallic post d, which carries the contact-point D. The battery is connected by wire G2 with the stud e, while the swiveled post and spring connect the stud c with contactpoint D. When the parts have been adjusted as described, the device operates in the usual manner. When the operator is through using the device, the set-screw F is unloosened and the swivel-post automatically turns so as to relieve the spring B of all tension, whereupon the magnet attracts the armature and draws the spring away from the contact-point D, thus breaking the circuit, which circuit remains broken because the spring hasno power to move back into contact with the point E. In other words, to render the device inoperative the operator has to do one thing onlynamely, turn the set-screw F in the only direction in which it can be turned, and the parts immediately assume a position in which the circuit is broken and all tension is removed from the vibrator-spring. The vibrator-spring and the swivel-post therefore serve as an automatic switch by means of which the circuit is broken.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device for producing an interrupted electric current, the combination of an electromagnet, a vibrator-spring, a swivel post to which the same is secured, and means for fixing the post in the proper position, with a contact-point, and means for connecting said magnet, spring, and contact-point in series in an electric circuit which is interrupted by the vibration of the spring, substantially as above specified.

2. In an apparatus for producingan inter post mounted thereon, and a set-screw passrupted electriccurrent the combination of an I 3. A vibrator for interrupting an electrical electromagnet, fixed cylindrical stud, sleevecurrent, consisting of a vibrator-spring, a s'wiveled post to which the spring is secured, and means for preventing said post from turn- I5 in g, substantially as above specified.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

CHAS. A. KELLER.

ing through said sleeve-post and adapted to engage with said stud, with a vibrator-spring secured to said sleeve-post, a contact-point adapted to engage with the spring, and means connecting contact-point, stud and electro-- magnet in series in, an electric circuit which is interrupted by the vibration of the spring, substantially as and for the purpose specified.

Witnesses:

E. L. THURSTON, PHILIP E. KNOWLTON. 

